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What's an HRV?
Check out the below infographic about what an HRV is and the various ways that they can connect to your heating system.
Managing Depressurization - Last tips
In the case where you must have a large exhaust device, here are some tips to minimize the implications due to depressurization. The first recommendation would be to eliminate any spillage susceptible combustion appliance (eg. fireplace) as this resolves all issues. If this is not an option, then, my suggestion would be to duct the required HRV from the kitchen (and bathrooms) and NOT install a kitchen range fan vented to outside. The HRV would then be the kitchen exhaust….however, this is only an option if the range is electric and not propane.
If the kitchen range is propane then TSSA requires a traditional kitchen exhaust fan. If the range is electric and the HRV is managing the kitchen ventilation then only the clothing dryer has to be managed. This can sometimes be achieved with an inexpensive Passive Fresh Air Intake…..rather than an expensive power makeup air system.
In order to properly size a make up air system, we can perform an HRAI W-3 calculation to manage depressurization in your home.
Large Range Hoods - Are they worth it?
We often come across clients who are excited to be getting a new large range hood, but are unaware of the implications of managing them with a make-up air system. To manage the depressurization of a 600cfm range hood, one would have to install a make-up air (MUA) system and interlock it to the kitchen range. When the range turns on, so does a make-up air fan to simultaneously re-pressurize the home to prevent any form of depressurization. This could be challenge to wire since the kitchen may already be finished.
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